OK, I'll preface my post by saying I haven't read all 93 pages of this thread, only about 3 pages out of every 10 or so.
I have a very ambivalent relationship with the 'Realms. Sometimes I love it, sometimes I absolutely hate it. The Old Grey Box, I loved. That was a setting I could get into; very cool, lots of hits of fascinating stuff. And as more was filled in with the 1E books, I loved it more.
But then came 2nd Edition, and the wonderful 'Realms was assaulted by the Avatar Crisis and its fallout, and things went downhill rapidly from there for me. My friends and I call it the "Disneyfication" of the 'Realms; the bloat, the explicit rule that Bad Guys could never be shown to win (and they always had to be portrayed as bumbling Keystone Cops) and the Harpers became omnipresent and infallible... and I like the Harpers! The Code of the Harpers is a great book, and I still read it from time to time just for fun) etc. I even noticed it in the change of color scheme of the trade dress for the campaign setting; 1st Edition Forgotten Realms was dark and grey; 2nd Edition 'Realms was light and purple. The effect was to turn me off the 'Realms for essentially an entire decade.
Then 3rd Edition happened, and I loved the 'Realms all over again. The FRCS was beautiful, and added a new, extremely welcome level of consistency and coherency to the myriad mismatched elements of wildly varying levels of quality that all the many, many 2E books had added. The FRCS put together everything that had been spit out for the 2E 'Realms, and made it make sense.
But then 4th Edition happened, and they utterly wrecked everything about the 'Realms that had ever made it unique or interesting; the "spellplague" destroyed Mystra and the Weave (which is, in my opinion, without question the most unique, interesting element of the Forgotten Realms; the living stuff of magic that permeated the universe of the 'Realms, and the effective Goddess that was a woman's intelligence layered onto it to maintain, regulate, patch, and guide it), the abominable retcon of Abeir and Toril having been separated into two distinct worlds in prehistory, the addition of dragonmen as a PC race and the retcon of Tieflings as an entire uniform race of accursed, thick-tailed, ram-horned devil-people (instead of being individual humans of fiendish ancestry with varied and unique appearance)... just, UGH. And like that, every fond feeling I ever had for the 'Realms was essentially obliterated because I could never think of the setting again without being reminded of the destruction they had wrought in one fell swoop in an ill-advised attempt to "change things up," or whatever their reasoning was. I am still appalled at what they did. Yes, I know I can just ignore the changes they made and pretend it never happened, but it's like how I used to totally love mayonnaise when I was younger... until the time I got sick from some bad mayo, and now even just the thought of it makes me nauseous. Sense memory and bad associations can absolutely taint things you would otherwise love (and the memory of 4E altogether is a very bad sense memory for me.)
But the thing that has always really irked me about the 'Realms is the way it has been presented from almost the very beginning; as "the most popular D&D setting evar." From almost immediately after the very first boxed set was published, the 'Realms have been portrayed as the most popular setting for D&D... even before it would have been at all possible to have gathered any such information about it's popularity. It was published, and suddenly *BOOM* it's the most popular thing EVER. Now, I'm a bigtime Greyhawk guy, and that has just always rubbed me exactly the wrong way and has always smacked of a predetermined plan to *make* the 'Realms "the most popular"... whether it actually was or not. After all, we all know about the, a-hem, "extensive" customer research TSR actually did at the time (zilch.) So just how did TSR so quickly know that the 'Realms was more popular than the Beatles? Easy; they decided ahead of time that it would be, and then just dedicated all of their resources to pump it out.) Especially since the "overwhelming popularity" of the Forgotten Realms was used as justification to stop publishing Greyhawk material. I remember how things were at the time, and far from some unified cry from the fans of "More 'Realms, no More Greyhawk" it was much more like "we're only going to publish Forgotten Realms because we've decided it will be the most popular." At least to me and all my friends, the "overwhelming popularity" of the Forgotten Realms appeared to be entirely manufactured by TSR. Sure, in any given year between '89 and '91 there may have been 3 Greyhawk, 3 Ravenloft, 4 Dark Sun, and 3 Spelljammer books on the shelves... but at the same time they were crowded out by 10 Forgotten Realms books and 3 boxed sets. It was pretty damn obvious where TSR was putting the vast majority of its resources, and so that was what everyone bought. 85% of TSR's 2nd Edition output was Forgotten Realms, and even books that were nominally "generic AD&D" based on the cover logo were actually set in the 'Realms once you opened them up and started reading. At least from where my friends and I were standing it wasn't so much that the 'Realms were what everyone was demanding, it was that the 'Realms was what TSR was dedicating itself to producing. "Supply-Side Campaign Setting." And then when Carl Sergeant (who had previously been a fairly famous parapsychologist at Cambridge!) just up and disappeared after that car accident, even as we were still eagerly awaiting Ivid the Undying, suddenly that was it... No More Greyhawk.
So, as much as I like the Forgotten Realms at times (and there have absolutely been times when I loved it) I will nevertheless still always bear something of a grudge against the setting... not so much for its own qualities (although the 2E 'Realms could get pretty horrid at times, and 4E 'Realms as just absolutely Abysmal) but for the feeling of being force-fed Toril with little-to-no alternative at the expense of my beloved Greyhawk.
PS- I apologize for any typos in this post; the "B" and "N" keys on my keyboard have stopped working, and I am reduced to individually cutting and pasting those letters from a Notepad file as needed (or relying on spellcheck), so if I missed any anywhere I am sorry for the confusion.